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This study evaluates the management capacity ability and profitable capacity of eight public-private partnership hospitals in Taiwan from 2015 to 2020. By conducting various ratio analyses of the financial statement, this study found these hospitals have achieved a balance between management efficiency and profitability, thereby confirming the viability of the PPP model for hospital management. In addition, the subject hospitals play a vital role as isolation hospitals during the COVID-19 pandemic. Beyond offering medical assistance to infected individuals, these hospitals contribute to the integrity of Taiwan's medical network, mitigating the impact of the pandemic. Overall, establishing and managing hospitals with PPP partnership is a feasible solution as it alleviates governmental financial burdens related to medical welfare and achieves profitability.
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COVID-19 , Parcerias Público-Privadas , Humanos , Taiwan , Pandemias , HospitaisRESUMO
Objectives: To explore the utilization, barriers, and factors associated with the targeted treatment of Chinese metastatic colorectal cancer (mCRC) patients. Methods: A total of 1,688 mCRC patients from 19 hospitals in 14 cities were enrolled from March 2020 to March 2021 using stratified, multistage cluster sampling. The use of targeted therapy and any barriers patients experienced were collected. Logistic regression analyses were conducted to identify the factors associated with initiating targeted treatment. Results: About 51.6% of the patients initiated targeted therapy, of whom 44.5%, 20.2%, and 35.2% started first-, second-, and third-line treatment, respectively. The most reported barriers were high medical costs and a lack of belief in the efficacy of targeted therapy. Patients treated in the general hospital, diagnosed at an older age, less educated, and who had a lower family income, no medical insurance, poor health-related quality of life, metastasis outside the liver/lung or systemic metastasis, a shorter duration of mCRC were less likely to initiate targeted therapy. Conclusion: Reduced medical costs and interventional education to improve public awareness could facilitate the use of targeted treatment for mCRC.
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Neoplasias do Colo , Neoplasias Colorretais , Humanos , Neoplasias Colorretais/tratamento farmacológico , Qualidade de Vida , Custos e Análise de Custo , HospitaisRESUMO
AIM: The aim was to evaluate the feasibility of protective measures for infants of low-income SARS-CoV-2 positive breastfeeding mothers. BACKGROUND: Breastfeeding mothers with SARS-CoV-2 positive should avoid exposing the infant through protective measures (PM), but it could be challenging in a low-income population. METHODS: A prospective, multicenter study was conducted between July and October 2020 (BRACOVID). The participants were recruited at birth and interviewed through a structured questionnaire at seven and 14 days in the home environment. The feasibility of PM during breastfeeding at home was defined by guidelines recommendations (mask using, handwashing, and distancing from newborn when not breastfeeding). Three groups according to the feasibility of guidelines: complete guidelines feasibility (CG): all PM; partial guidelines feasibility (PG): at least one PM feasible; no guidelines (NG): infeasibility to all of PM. Flu-like neonatal symptoms, mothers' breastfeeding practices. We evaluated the association between PM feasibility and socioeconomic factors. RESULTS: 117 infected mothers from 17 Brazilian hospitals were enrolled. 47 (40%) mothers followed all recommendations, 14 (11.9%) could not practice at least one recommendation, and 50 (42.7%) did not execute any of them. The breastfeeding rate was 98%. Factors associated with infeasibility were monthly family income < 92.7 dollars/person, high housing density (>1 inhabitant/room), teenage mothers, responsive feeding, and poor schooling. Regarding infants' flu-like symptoms, 5% presented symptoms at fourteen days (NG group). CONCLUSION: The guidelines were not applied to infants of SARs-CoV-positive mothers in 54.6% of the dyads since the recommendations were unviable in their environments. During pandemics, we should look for feasible and effective guidelines to protect neonates from low-income populations. IMPLICATIONS FOR NURSING MANAGEMENT: Poor socioeconomic conditions lead to the unfeasibility of protective measures for infants of low-income SARS-CoV-2 positive breastfeeding mothers during the isolation period in the pandemics. The orientations and the support provided to dyad should consider the socioeconomic factors to guide feasible measures in the home environment and promote adequate protections; only an individual approach will allow a safe environment for low-income infants.
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Background: Colorectal cancer (CRC) causes a substantial disease burden in China. Information on the medical expenditure of CRC patients is critical for decision-makers to allocate medical resources reasonably, however, relevant data is limited in China, especially advanced CRC. The aim of this survey was to quantify the out-of-pocket medical expenditure of advanced CRC and explore associated factors. Methods: A nation-wide, multi-center, cross-sectional survey was conducted from March 2020 to March 2021. Nineteen hospitals in seven geographical regions were selected by multi-stage stratified sampling. For each eligible CRC patient with stage III or IV disease in the selected hospitals, the socio-demographics, clinical information, and range of out-of-pocket medical expenditure data were collected based on patients' self-reporting or medical records. Multivariable logistic analysis was used to explore associated factors of medical expenditure. All statistical analyses were conducted using SAS 9.4. Results: The mean age of the 4,428 advanced CRC patients included was 59.5±11.6 years, 59.6% were male, and 80.1% of patients were in stage III or IV at the time of diagnosis. Besides, 57.2% of patients had an annual household income of less than 50,000 Chinese Yuan (CNY), 40.9% of patients had an out-of-pocket medical expenditure of 50,000-99,999 CNY. As for the affordability of medical expenditure, 33.2% could afford 50,000-99,999 CNY. Multivariate analysis showed that patients who were in the southern [odds ratio (OR): 1.63, 95% confidence interval (CI): 1.31-2.03] and southwestern (OR: 1.55, 95% CI: 1.25-1.93), were in stage III at the time of diagnosis (OR: 1.33, 95% CI: 1.13-1.57), visited three or more hospitals (OR: 1.26, 95% CI: 1.04-1.52), had sought cross-regional health care (OR: 1.60, 95% CI: 1.40-1.83), used genetic testing (OR: 1.26, 95% CI: 1.10-1.45) and targeted drugs (OR: 2.12, 95% CI: 1.79-2.51) had higher out-of-pocket medical expenditure. Conclusions: Patients with advanced CRC had a high out-of-pocket medical expenditure. It is necessary to strengthen the prevention and control of CRC to reduce the disease burden; also, it is critical to deepen the reform of the medical system, increase proportion of medical insurance reimbursement, and remove barriers to cross-regional health care.
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OBJECTIVE: To investigate the variation in T2 at different zones of normal hip cartilage in children and the relationship between T2 value and age. MATERIALS AND METHODS: Nineteen children with 30 normal hip joints were evaluated with a coronal T2 mapping sequence at a 3-Tesla MRI system. The femoral cartilage and acetabular cartilage were firstly segmented by mask-based interactive method and then equally divided into eight and six radial sections, respectively. Moreover, each radial section was further divided into two layers referring to the superficial and deep halves of the corresponding cartilage. Cartilage T2 of these sections and layers were measured and subsequently analyzed. RESULTS: There was a negative correlation between the T2 values in the hip cartilage and the age of children (rs < - 0.6, P1 < 0.05). Articular cartilage T2 increased at angles close to the magic angle (54.7°). Femoral cartilage and acetabular cartilage had a relatively shorter T2 in the radial sections near the vertex of the femoral head. The T2 values in superficial layers of both cartilages were significantly higher than those in deep layers (P < 0.05). CONCLUSION: The T2 value decreases as the cartilage developing into a more mature state. Cartilage T2 values in the weight-bearing areas are relatively low due to an increase of collagen density and the loss of interstitial water. The restriction of the water molecules by solid components in the deeper layer of cartilage may decrease the T2 values.
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Cartilagem Articular , Acetábulo/diagnóstico por imagem , Cartilagem Articular/diagnóstico por imagem , Criança , Articulação do Quadril/diagnóstico por imagem , Humanos , Imageamento por Ressonância Magnética/métodos , ÁguaRESUMO
INTRODUCTION: Returning to paid employment is one of the reasons women stop breastfeeding earlier than they planned to. This systematic review aimed to provide insight into the experiences and views of women and employers on breastfeeding and returning to paid employment, with findings used to inform practice and policy. METHODS: The review was guided by the Joanna Briggs Institute (JBI) methodology for systematic reviews of qualitative evidence. Medline, CINAHL, PsycINFO, and Web of Science databases were searched for studies published in English. JBI's meta-aggregative approach informed data analysis. The studies in this analysis included women who stopped breastfeeding before, and those who continued breastfeeding after, returning to paid employment and the employers, work managers, or supervisors of women who continued breastfeeding after returning to paid employment. RESULTS: Twenty-six articles presenting findings from 25 studies were included and critically appraised. Synthesized findings showed that women experienced physical and emotional difficulties and described gender and employment inequalities in accessing and receiving the support they needed. Women reported that the importance of their own motivation and having workplace legislation in place facilitated breastfeeding during employment. Support from employers, colleagues, and family members, as well as access to convenient child care, helped women continue breastfeeding on return to paid employment. Employers' personal experiences influenced their views on breastfeeding and working, and the need for more education and communication between employers and employers on breastfeeding in the workplace was recognized. DISCUSSION: Support from family, work colleagues, and employers was important to reduce the physical and emotional challenges women experienced when combing breastfeeding with return to paid employment. Gender inequalities, especially in low- and middle-income countries, in accessing support exacerbated the difficulties women experienced. Limited data were identified regarding employers' experiences and views, suggesting an urgent need for further research to explore employers' and work colleagues' experiences and views.
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Aleitamento Materno , Emprego , Feminino , Humanos , Pesquisa Qualitativa , Local de TrabalhoRESUMO
BACKGROUND: The developmental dysplasia of the hip (DDH) can cause a wide range of pathological changes, and often requires surgical treatment. Preoperative evaluation is very important for DDH. We aimed to assess the diagnostic capability of magnetic resonance imaging (MRI) for irreducible aspects preventing hip reduction in DDH. METHODS: A total of 39 pediatric patients who received DDH evaluation in pediatric orthopedics from January 2015 to December 2019 were included. The samples included 4 cases of bilateral DDH and 35 cases of unilateral DDH, a total of 43 hip joint samples. All patients underwent surgical treatment, pathological examination and MRI of hip joint. RESULTS: With pathological results or intraoperative findings as the gold standard, the sensitivity and specificity of MRI were 90.3% and 83.3% for the affected labrum, 92% and 83.3% for thickening of the round ligament, 90.0% and 91.3% for atrophy of the iliopsoas muscle, and 100% and 100% for fibrofatty pulvinar tissue and joint effusion, respectively. CONCLUTIONS: The MRI showed an extraordinary capability of detecting these irreducible factors and helped surgeon choose the appropriate treatment strategies.
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Displasia do Desenvolvimento do Quadril , Luxação Congênita de Quadril , Criança , Feminino , Quadril , Luxação Congênita de Quadril/diagnóstico por imagem , Luxação Congênita de Quadril/cirurgia , Articulação do Quadril/diagnóstico por imagem , Articulação do Quadril/cirurgia , Humanos , Imageamento por Ressonância MagnéticaRESUMO
Postpartum weight retention (PWR) is a risk factor for future obesity. The role of breastfeeding in reducing PWR is not fully understood. We examined the relationship between PWR and the duration of exclusive/partial breastfeeding in 52,367 postpartum women from 2012-2016 Taiwan national breastfeeding surveys. The women were interviewed at 7-14 months postpartum. Non-linear models were fit to examine the association between PWR and breastfeeding duration. PWR adjusted means and 95% confidence intervals were plotted and compared for the duration of exclusive/partial breastfeeding in the total sample and between pre-pregnancy body-mass index (BMI) groups (underweight, normal, overweight, and obese). Women who breastfed exclusively for >30 days showed significantly lower PWR than those who did not breastfeed and those who breastfed partially for the same duration, thereafter each additional duration of 30 days being associated with an average of 0.1-0.2 kg less PWR. Women who breastfed partially for 120 days showed lower PWR than those who did not or those who ceased to breastfeed, thereafter each additional duration of 30 days being associated with an average of 0.1 kg less PWR. Duration of breastfeeding needed to achieve significantly less PWR differed between pre-pregnancy BMI groups, but the effect of exclusive breastfeeding appeared earlier in the normal weight group. Women with obesity who breastfed exclusively for >30 or partially for >180 days, had lower PWR than non-obese groups. The observed dose-response relationship between breastfeeding duration and PWR supports the "every feeding matters" approach in breastfeeding promotion. The larger effect of exclusive and partial breastfeeding on PWR in women with obesity may draw special attention of breastfeeding promotion.
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Índice de Massa Corporal , Manutenção do Peso Corporal/fisiologia , Peso Corporal/fisiologia , Aleitamento Materno , Obesidade/etiologia , Obesidade/prevenção & controle , Período Pós-Parto/fisiologia , Feminino , Promoção da Saúde , Humanos , Fatores de Risco , Inquéritos e Questionários , Taiwan , Fatores de TempoRESUMO
A newly developed in vivo Pig-a gene mutation assay displays great potential for integration into genotoxicity tests. To obtain more evidence for application of the Pig-a assay, we integrated this assay, micronucleus test in peripheral blood (MN-pb test) and bone marrow (MN-bm test), as well as a Comet assay into a transgenic RasH2 mice carcinogenicity study. Fourteen male RasH2 mice and five wild-type (WT) mice were treated with a strong mutagen aristolochic acid I at a dose of 5 mg/kg/day for 4 consecutive weeks. Mice recovered in 5 weeks. Peripheral bloods were collected for Pig-a assay, MN-pb test, and Comet assay at several time points, while bone marrow and target organs were harvested for the MN-bm test and pathological diagnosis after mice were euthanized. Finally, 13 of the 14 RasH2 mice developed squamous cell carcinomas in the forestomach, while there were no carcinomas in the WT mice. Pig-a mutant frequencies (MFs) consecutively increased throughout the study to a maximum value of approximately 63-fold more than background. These frequencies were relative to the incidence, size, and malignant degree of tumors. Micronucleated reticulocytes increased from Day 1 to Day 49, before returning to background levels. No positive responses were observed in either the MN-bm test or the Comet assay. Results suggested that, when compared with the other two tests, the Pig-a assay persistently contributed to sustaining MFs, enhanced detection sensitivity due to the accumulation of Pig-a mutations, and demonstrated better predictability for tumorigenicity. Environ. Mol. Mutagen. 61:266-275, 2020. © 2019 Wiley Periodicals, Inc.
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Ácidos Aristolóquicos/toxicidade , Carcinógenos/toxicidade , Animais , Medula Óssea/efeitos dos fármacos , Medula Óssea/patologia , Carcinogênese/induzido quimicamente , Carcinogênese/genética , Carcinogênese/patologia , Ensaio Cometa/métodos , Humanos , Masculino , Camundongos , Camundongos Endogâmicos BALB C , Camundongos Endogâmicos C57BL , Camundongos Transgênicos , Micronúcleos com Defeito Cromossômico/induzido quimicamente , Testes para Micronúcleos/métodosRESUMO
The objective of this work is to develop a low-cost compact desktop NMR system based on Halbach magnets with the advantages of small size and ability to generate relatively high field strength. Considering the cost of manufacturing and assembling the magnetic blocks, the system utilized a 3-layer Halbach magnet and a wedge-shaped mechanical structure, which was designed for magnet rapid assembling. The comparison between simulation and calculation results of the initial magnetic field strength distribution showed that design theory and practice were in accordance. The initial homogeneity was 576â¯ppm in a square with a length of 5â¯mm. After passive shimming with two magnetic blocks and steel pieces, the uniformity reached 120â¯ppm in the same area. We developed and tested a compact single board spectrometer with digital modulation and demodulation in order to enhance the system mobility and improve the SNR. A self-made probe was used to carry out experiments with the spectrometer, and the spectral width at half-height reached 20â¯ppm in a cylinder with a diameter of 1.5â¯mm and a length of 1â¯mm. Compact structure and low cost of the system will facilitate and extend the application of desktop NMR system.
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Although the antibacterial performances of emerging nanoparticles (NPs) have been extensively explored in the nitrifying systems, the impacts of dissolved oxygen (DO) levels on their bio-toxicities to the nitrifiers and the impaired cells' recovery potentials have seldom been addressed yet. In this study, the physiological and transcriptional responses of the typical ammonia oxidizers - Nitrosomonas europaea in a chemostat to the chronic ZnO NP exposure under different DO conditions were investigated. The results indicated that the cells in steady-growth state in the chemostat were more persevering than batch cultured ones to resist ZnO NP stress despite the dose-dependent NP inhibitory effects were observed. In addition, the occurred striking over-expressions of amoA and hao genes at the initial NP exposure stage suggested the cells' self-regulation potentials at the transcriptional level. The low DO (0.5â¯mg/L) cultured cells displayed higher sensitivity to NP stress than the high DO (2.0â¯mg/L) cultured ones, probably owning to the inefficient oxygen-dependent electron transfer from ammonia oxidation for energy conversion/production. The following 12-h NP-free batch recovery assays revealed that both high and low DO cultured cells possessed the physiological and metabolic activity recovery potentials, which were in negative correlation with the NP exposure time. The duration of NP stress and the resulting NP dissolution were critical for the cells' damage levels and their performance recoverability. The membrane preservation processes and the associated metabolism regulations were expected to actively participate in the cells' self-adaption to NP stress and thus be responsible for their metabolic activities recovery.
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Amônia/metabolismo , Nanopartículas Metálicas/química , Nitrosomonas europaea/crescimento & desenvolvimento , Nitrosomonas europaea/metabolismo , Oxigênio/metabolismo , Óxido de Zinco/farmacologia , Aclimatação/efeitos dos fármacos , Expressão Gênica/efeitos dos fármacos , Oxirredução , Estresse Fisiológico/fisiologia , Óxido de Zinco/metabolismoRESUMO
OBJECTIVES: To investigate the association between the trends of CT utilisation in an emergency department (ED) and changes in clinical imaging practice and patients' disposition. SETTING: A hospital-based retrospective observational study of a public 1520-bed referral medical centre in Taiwan. PARTICIPANTS: Adult ED visits (aged ≥18â years) during 2009-2013, with or without receiving CT, were enrolled as the study participants. MAIN OUTCOME MEASURES: For all enrolled ED visits, we retrospectively analysed: (1) demographic characteristics, (2) triage categories, (3) whether CT was performed and the type of CT scan, (4) further ED disposition, (5) ED cost and (6) ED length of stay. RESULTS: In all, 269â 239 adult ED visits (148â 613 male patients and 120â 626 female patients) were collected during the 5-year study period, comprising 38â 609 CT scans. CT utilisation increased from 11.10% in 2009 to 17.70% in 2013 (trend test, p<0.001). Four in 5 types of CT scan (head, chest, abdomen and miscellaneous) were increasingly utilised during the study period. Also, CT was increasingly ordered annually in all age groups. Although ED CT utilisation rates increased markedly, the annual ED visits did not actually increase. Moreover, the subsequent admission rate, after receiving ED CT, declined (59.9% in 2009 to 48.2% in 2013). CONCLUSIONS: ED CT utilisation rates increased significantly during 2009-2013. Emergency physicians may be using CT for non-emergent studies in the ED. Further investigation is needed to determine whether increasing CT utilisation is efficient and cost-effective.
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Serviço Hospitalar de Emergência/organização & administração , Tomografia Computadorizada por Raios X/estatística & dados numéricos , Tomografia Computadorizada por Raios X/tendências , Triagem/classificação , Adolescente , Adulto , Idoso , Análise Custo-Benefício , Bases de Dados Factuais , Feminino , Humanos , Tempo de Internação , Masculino , Pessoa de Meia-Idade , Encaminhamento e Consulta , Estudos Retrospectivos , Taiwan , Adulto JovemRESUMO
MANY OLDER people are healthy and live independently or with some support in their own homes. However, an increasing ageing population with a varied profile of health, functioning and wellbeing means that in later life more people may need some form of health and social care and live in various facilities.
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Necessidades e Demandas de Serviços de Saúde/tendências , Instituição de Longa Permanência para Idosos , Casas de Saúde , Idoso , Competência Clínica , Humanos , Recursos Humanos de Enfermagem/provisão & distribuição , Reino UnidoRESUMO
BACKGROUND: A national health literacy scale was developed in China in 2012, though no studies have validated it. In this investigation, we assessed the reliability, construct validity, and measurement invariance of that scale. METHODS: A population-based sample of 3731 participants in Hunan Province was used to validate the Chinese Resident Health Literacy Scale based on item response theory and classical test theory (including split-half coefficient, Cronbach's alpha, and confirmatory factor analysis). Measurement invariance was examined by differential item functioning. RESULTS: The overall Cronbach's alpha of the scale was 0.95 and Spearman-Brown coefficient 0.94. Confirmatory factor analysis showed that the test measured a unidimensional construct with three highly correlated factors. Highest discrimination was found among participants with limited to moderate health literacy. In all, 64 items were selected from the original scale based on factor loading, Pearson's correlation coefficient, and discrimination and difficulty parameters in item response theory. Measurement invariance was significant but slight. According to the two-level linear model, health literacy was associated with education level, occupation, and income. CONCLUSIONS: The 2012 national health literacy scale was validated, and 64 items were selected based on classical test theory and item response theory. The revised version of the scale has strong psychometric properties with minor measurement invariance.
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Letramento em Saúde/estatística & dados numéricos , Inquéritos e Questionários/normas , Adolescente , Adulto , Distribuição por Idade , Idoso , China , Análise Fatorial , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Psicometria , Reprodutibilidade dos Testes , Fatores Socioeconômicos , Adulto JovemRESUMO
The genotoxicity of melamine was evaluated with the combined Pig-a mutation/micronucleus assay, the bacterial reverse mutation assay, and the in vitro cytokinesis-block micronucleus assay (CBMN). Five groups of six- to eight-week-old male Sprague-Dawley (SD) rats were given three daily doses of vehicle control (100% pure sesame oil), melamine (500, 1000, and 2000 mg/kg) or positive control (N-ethyl-N-nitrosourea, ENU, 20 mg/kg) by oral gavage. Peripheral blood was sampled pre-dose (day -1) and at time points up to day 60. Pig-a mutant frequencies were determined in total red blood cells (RBCs) and reticulocytes (RETs) as RBC(CD59-) and RET(CD59-) frequencies, on days -1, 15, 29 and 60, and micronucleus frequencies were measured in RETs on day 4. No significant increases in RBC(CD59-) or RET(CD59-) frequencies were observed for the melamine-treated group at any of the time points studied, but the positive control, ENU, induced statistically significant increases compared with the vehicle control. Similar results were obtained in the micronucleus assay. Melamine did not induce statistically significant increases in %MN-RET. In the bacterial reverse mutation assay, melamine was tested from 62.5 to 1000 µg/plate in tester strains TA97a, TA98, TA100, TA102, and TA1535, with and without metabolic activation, and no evidence of toxicity or mutagenicity was observed at any dose tested. In the in vitro CBMN assay, in Chinese hamster ovary (CHO) cells, melamine was tested (75, 150, and 300 µg/mL) in the presence and absence of S9 mix, and no positive increases in the number of cells containing micronuclei were seen. These results suggest that melamine does not exhibit significant genotoxic potential. These data could be valuable for risk assessment purposes and also for further characterizing the new in vivoPig-a gene mutation assay.
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Eritrócitos/efeitos dos fármacos , Mutação , Resinas Sintéticas/toxicidade , Reticulócitos/efeitos dos fármacos , Salmonella typhimurium/efeitos dos fármacos , Triazinas/toxicidade , Administração Oral , Animais , Antígenos CD59/genética , Células CHO , Cricetulus , Relação Dose-Resposta a Droga , Eritrócitos/citologia , Eritrócitos/metabolismo , Etilnitrosoureia/toxicidade , Excipientes/administração & dosagem , Expressão Gênica , Masculino , Testes para Micronúcleos , Ratos , Ratos Sprague-Dawley , Reticulócitos/citologia , Reticulócitos/metabolismo , Salmonella typhimurium/genética , Salmonella typhimurium/crescimento & desenvolvimento , Óleo de Gergelim/administração & dosagemRESUMO
Pharmacoeconomics is an important part of the postmarketing Chinese medicine (CM) evaluation, and postmarketing pharmacoeconomic evaluation can reveal the clinical and market value of CM. The purpose of establishing the guideline for pharmacoeconomic evaluation is to make the evaluation process and results regarding Chinese patent medicines both scientific and fair. Every country's guidelines for pharmacoeconomic evaluation act as reference guidelines, we have already drawn up the guideline that takes into account the special characteristics of CM; and these are in preparation for the postmarketing CM pharmacoeconomic evaluation.
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Farmacoeconomia , Guias como Assunto , Vigilância de Produtos Comercializados/economia , Ensaios Clínicos como Assunto , Análise Custo-Benefício , Humanos , Preparações Farmacêuticas/economia , Estatística como AssuntoRESUMO
A sensitive on-line DPPH-CE-DAD method was developed and validated for both screening and determining the concentration of seven antioxidants of Reduning injection. The pH and concentrations of buffer solution, SDS, ß-CD and organic modifier were studied for the detection of DPPH and seven antioxidants. By on-line mixing DPPH and sample solution, a DPPH-CE method for testing the antioxidant activity of the complex matrix was successfully established and used to screen the antioxidant components of Reduning injection. Then, antioxidant components including caffeic acid, isochlorogenic acid A, isochlorogenic acid B, isochlorogenic acid C, chlorogenic acid, neochlorogenic acid and cryptochlorogenic acid were quantified by the newly established CE-DAD method. Finally, the total antioxidant activity and the multiple active components were selected as markers to evaluate the quality of Reduning injection. The results demonstrated that the on-line DPPH-CE-DAD method was reagent-saving, rapid and feasible for on-line simultaneous determination of total pharmacological activity and contents of multi-components samples. It was also a powerful method for evaluating the quality control and mechanism of action of TCM injection.
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Compostos de Bifenilo/química , Medicamentos de Ervas Chinesas/análise , Eletrônica/instrumentação , Eletroforese Capilar/instrumentação , Eletroforese Capilar/métodos , Sistemas On-Line , Picratos/química , Acetonitrilas/química , Antioxidantes/análise , Calibragem , Eletricidade , Concentração de Íons de Hidrogênio , Concentração Inibidora 50 , Injeções , Limite de Detecção , Padrões de Referência , Temperatura , Fatores de Tempo , beta-Ciclodextrinas/químicaRESUMO
Genotoxicity assessments were conducted on male Sprague Dawley rats treated with 5-fluorouracil (5-FU) and 4-nitroquinoline-1-oxide (4NQO) as part of an international validation trial of the Pig-a mutant phenotype assay. Rats were orally exposed to 0, 11.5, 23, or 46 mg/kg/day 5-FU for three consecutive days (Days 1-3); blood was sampled on Days -1, 4, 15, 29, and 45. Pig-a mutant phenotype reticulocyte (RET(CD59-)) and mutant phenotype erythrocyte (RBC(CD59-)) frequencies were determined on Days -1, 15, 29, and 45, and percent micronucleated reticulocytes (%MN-RET) were measured on Day 4. Rats were treated with 4NQO for 28 consecutive days by oral gavage, at doses of 1.5, 3, or 6 mg/kg/day. RBC(CD59-) and RET(CD59-) frequencies were determined on Days -1, 15, and 29, and MN-RET were quantified on Day 29. Whereas 5-FU was found to increase %MN-RET, no significant increases were observed for RBC(CD59-) or RET(CD59-) at any of the time points studied. The high dose of 4NQO (6 mg/kg/day) was observed to markedly increase RBC(CD59-) and RET(CD59-) frequencies, and this same dose level caused a weak but significantly elevated increase in MN-RET (approximately twofold). Collectively, the results provide additional support for the combination of Pig-a mutation and MN-RET into acute and 28-day repeat-dose studies.
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4-Nitroquinolina-1-Óxido/toxicidade , Antígenos CD59/genética , Fluoruracila/toxicidade , Testes para Micronúcleos/métodos , Animais , Relação Dose-Resposta a Droga , Eritrócitos/efeitos dos fármacos , Masculino , Mutação , Ratos Sprague-Dawley , Reticulócitos/efeitos dos fármacos , Testes de Toxicidade Aguda/métodosRESUMO
There is a new research model named 'registry study/patient registry' in Western medicine, which could be referred to by Chinese medicine researchers, such as active safety surveillance. This article will introduce registry study from different aspects as the developing history, features, and application in order to inform Chinese medicine researchers of future studies.
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Medicina Tradicional Chinesa/efeitos adversos , Fitoterapia/efeitos adversos , Sistema de Registros , Gestão da Segurança/métodos , Marketing , Medicina Tradicional Chinesa/economia , Fitoterapia/economiaRESUMO
Pharmacoeconomics is an important part of the post-marketing evaluation of Chinese medicine, post-marketing pharmacoeconomic evaluation can better reflect the clinical and market value of Chinese medicine, the purpose of establishing the technical specifications for pharmacoeconomic evaluation is to make the evaluation process and results regarding Chinese patent medicines more scientific and fair. Every country's technical specifications for pharmacoeconomic evaluation act as reference guidelines, we have already drawn up the technical specifications which take into account the special characteristics of Chinese medicine; these are in preparation for post-marketing pharmacoeconomic evaluation Chinese medicine.